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1059
Meas Setup
Margin
Selects a margin for this limit, which will cause a trace to Fail Margin when the trace is between the limit
line and the margin line. Portions of the traces which pass the limit but fail the margin are displayed in an
amber color.
A margin is always specified in dB relative to a limit – an upper limit always has a negative margin, and
a lower limit always has a positive margin. If a value is entered with the incorrect sign, the system
automatically takes the negative of the entered value.
If the limit type is switched from lower to upper while margin is present, the margin reverses sign.
When the Margin is selected, it may be turned off by pressing the Margin key until Off is underlined.
This may also be done by performing a preset. Margin is the default active function whenever the margin
is on, and it is not the active function whenever the margin is off.
The margin lines are displayed in the same color as limit lines, but paler. If the limited trace is blanked
then the limit line and the margin line is blanked as well.
Key Path Meas Setup, Limits
Remote Command :CALCulate:LLINe[1]|2|3|4|5|6:MARGin <rel_ampl>
:CALCulate:LLINe[1]|2|3|4|5|6:MARGin?
:CALCulate:LLINe[1]|2|3|4|5|6:MARGin:STATe OFF|ON|0|1
:CALCulate:LLINe[1]|2|3|4|5|6:MARGin:STATe?
Example :CALC:LLIN1:MARG –2dB sets limit line 1’s margin to –2 dB (Limit Line 1
is by default an upper limit).
:CALC:LLIN2:MARG 1dB sets limit line 2’s margin to 1 dB (Limit Line 2 is
by default a lower limit).
:CALC:LLIN2:MARG:STAT OFF turns off the margin for limit line 2 and
removes any tests associated with that margin line.
Notes The queries “Limit Line Fail?” (:CALCulate:LLINe[1]|2|3|4|5|6:FAIL?) and
“Trace Fail?” (:CALCulate:TRACe[1]|2|3|4|5|6:FAIL?) will return 1 if the
margin fails.
Couplings This will affect :CALC:LLIN3:FAIL or :CALC:TRAC2:FAIL?
Preset not affected by Mode Preset, set to 0 dB for all Limits by Restore Mode
Defaults.
State Saved Saved in instrument state.
Min –40 dB (Upper); 0 dB (Lower)
Max 0 dB (Upper); 40 dB (Lower);
Default Unit dB
Initial S/W Revision A.02.00